Baby Doll

Mary Louise Dahl, aka Baby Doll, is a fictional character in the DC animated universe, appearing in two episodes of Batman: The Animated Series. Baby Doll suffers from a disorder called systemic hypoplasia, similar to dwarfism but more extreme, which causes its victims to cease aging at a certain point in childhood. Dahl stopped aging at approximately the age of six. As a result, she has the mental and emotional capacity of an adult, but the body of a child. Although the Animated Series... full article at wikipedia